ICD-10-CM Code J98.51


Version 2020 Billable Code

Valid for Submission

J98.51 is a billable code used to specify a medical diagnosis of mediastinitis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code J98.51 might also be used to specify conditions or terms like acute mediastinitis, classical histoplasmosis mediastinal granuloma, drug-induced granulomatous mediastinitis, familial fibrous mediastinitis, granulomatous mediastinitis, hemorrhagic mediastinitis, etc

Short Description:Mediastinitis
Long Description:Mediastinitis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code J98.51:

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • underlying condition, if applicable, such as postoperative mediastinitis T81

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code J98.51 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute mediastinitis
  • Classical histoplasmosis mediastinal granuloma
  • Drug-induced granulomatous mediastinitis
  • Familial fibrous mediastinitis
  • Granulomatous mediastinitis
  • Hemorrhagic mediastinitis
  • Idiopathic hilar fibrosis
  • Infection of lower respiratory tract and mediastinum
  • Infectious fibrous mediastinitis
  • Infectious granulomatous mediastinitis
  • Infectious mediastinitis
  • Inflammatory disorder of mediastinum
  • Mediastinal radiation fibrosis
  • Pulmonary venous hypertension due to compression of pulmonary great vein
  • Pulmonary venous hypertension due to compression of pulmonary great vein by sclerosing mediastinitis
  • Radiation-induced fibrous mediastinitis
  • Sclerosing mediastinitis

Clinical Information

  • MEDIASTINITIS-. inflammation of the mediastinum the area between the pleural sacs.

Diagnostic Related Groups

The ICD-10 code J98.51 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Replacement Code

J9851 replaces the following previously assigned ICD-10 code(s):

  • J98.5 - Diseases of mediastinum, not elsewhere classified

Convert J98.51 to ICD-9

Code Classification

  • Diseases of the respiratory system (J00–J99)
    • Other diseases of the respiratory system (J96-J99)
      • Other respiratory disorders (J98)

Code History

  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020